package thread;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
public class SyncApiDemo2 {
    public static void main(String[] args) {
        List<Integer> list= Collections.synchronizedList(new ArrayList<>());
        Thread t1=new Thread(){
            public void run(){
                for(int i=0;i<1000;i++){
                    list.add(i);
                }
            }

        };
        Thread t2=new Thread() {
            public void run() {
                for (int i = 0; i < 2000; i++) {
                    list.add(i);

                }
            }
        };
        t1.start();
        t2.start();
        try{
        Thread.sleep(50);
        }catch (InterruptedException e){
        }
        System.out.println(list.size());
    }
    }